@article{01687312,
title = {Centrality and normality in protomodular categories.},
journal = {Theory and Applications of Categories [electronic only]},
volume = {8},
year = {2001},
pages = {151-165},
zbl = {1004.18004},
language = {en},
url = {http://dml.mathdoc.fr/item/01687312}
}
Bourn, Dominique; Gran, Marino. Centrality and normality in protomodular categories.. Theory and Applications of Categories [electronic only], Tome 8 (2001) pp. 151-165. http://gdmltest.u-ga.fr/item/01687312/